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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1f5a7e47 JB |
2 | /* |
3 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
4 | * Copyright 2005-2006, Devicescape Software, Inc. | |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
3b96766f | 6 | * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 7 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
fdf7cb41 | 8 | * Copyright 2015-2017 Intel Deutschland GmbH |
a0761a30 | 9 | * Copyright 2018-2020 Intel Corporation |
1f5a7e47 JB |
10 | */ |
11 | ||
11a843b7 JB |
12 | #include <linux/if_ether.h> |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/list.h> | |
d4e46a3d | 15 | #include <linux/rcupdate.h> |
db4d1169 | 16 | #include <linux/rtnetlink.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
bc3b2d7f | 18 | #include <linux/export.h> |
1f5a7e47 | 19 | #include <net/mac80211.h> |
2bdd713b | 20 | #include <crypto/algapi.h> |
d26ad377 | 21 | #include <asm/unaligned.h> |
1f5a7e47 | 22 | #include "ieee80211_i.h" |
24487981 | 23 | #include "driver-ops.h" |
1f5a7e47 JB |
24 | #include "debugfs_key.h" |
25 | #include "aes_ccm.h" | |
3cfcf6ac | 26 | #include "aes_cmac.h" |
8ade538b | 27 | #include "aes_gmac.h" |
00b9cfa3 | 28 | #include "aes_gcm.h" |
1f5a7e47 | 29 | |
11a843b7 | 30 | |
dbbea671 JB |
31 | /** |
32 | * DOC: Key handling basics | |
11a843b7 JB |
33 | * |
34 | * Key handling in mac80211 is done based on per-interface (sub_if_data) | |
35 | * keys and per-station keys. Since each station belongs to an interface, | |
36 | * each station key also belongs to that interface. | |
37 | * | |
b5c34f66 JB |
38 | * Hardware acceleration is done on a best-effort basis for algorithms |
39 | * that are implemented in software, for each key the hardware is asked | |
40 | * to enable that key for offloading but if it cannot do that the key is | |
41 | * simply kept for software encryption (unless it is for an algorithm | |
42 | * that isn't implemented in software). | |
43 | * There is currently no way of knowing whether a key is handled in SW | |
44 | * or HW except by looking into debugfs. | |
11a843b7 | 45 | * |
b5c34f66 JB |
46 | * All key management is internally protected by a mutex. Within all |
47 | * other parts of mac80211, key references are, just as STA structure | |
48 | * references, protected by RCU. Note, however, that some things are | |
49 | * unprotected, namely the key->sta dereferences within the hardware | |
50 | * acceleration functions. This means that sta_info_destroy() must | |
51 | * remove the key which waits for an RCU grace period. | |
11a843b7 JB |
52 | */ |
53 | ||
54 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 55 | |
ad0e2b5a | 56 | static void assert_key_lock(struct ieee80211_local *local) |
3b96766f | 57 | { |
46a5ebaf | 58 | lockdep_assert_held(&local->key_mtx); |
3b96766f JB |
59 | } |
60 | ||
f9dca80b MK |
61 | static void |
62 | update_vlan_tailroom_need_count(struct ieee80211_sub_if_data *sdata, int delta) | |
63 | { | |
64 | struct ieee80211_sub_if_data *vlan; | |
65 | ||
66 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
67 | return; | |
68 | ||
51f458d9 JB |
69 | /* crypto_tx_tailroom_needed_cnt is protected by this */ |
70 | assert_key_lock(sdata->local); | |
f9dca80b | 71 | |
51f458d9 JB |
72 | rcu_read_lock(); |
73 | ||
74 | list_for_each_entry_rcu(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
f9dca80b MK |
75 | vlan->crypto_tx_tailroom_needed_cnt += delta; |
76 | ||
51f458d9 | 77 | rcu_read_unlock(); |
f9dca80b MK |
78 | } |
79 | ||
3bff1865 YAP |
80 | static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata) |
81 | { | |
82 | /* | |
83 | * When this count is zero, SKB resizing for allocating tailroom | |
84 | * for IV or MMIC is skipped. But, this check has created two race | |
85 | * cases in xmit path while transiting from zero count to one: | |
86 | * | |
87 | * 1. SKB resize was skipped because no key was added but just before | |
88 | * the xmit key is added and SW encryption kicks off. | |
89 | * | |
90 | * 2. SKB resize was skipped because all the keys were hw planted but | |
91 | * just before xmit one of the key is deleted and SW encryption kicks | |
92 | * off. | |
93 | * | |
94 | * In both the above case SW encryption will find not enough space for | |
95 | * tailroom and exits with WARN_ON. (See WARN_ONs at wpa.c) | |
96 | * | |
97 | * Solution has been explained at | |
98 | * http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net | |
99 | */ | |
100 | ||
51f458d9 JB |
101 | assert_key_lock(sdata->local); |
102 | ||
f9dca80b MK |
103 | update_vlan_tailroom_need_count(sdata, 1); |
104 | ||
3bff1865 YAP |
105 | if (!sdata->crypto_tx_tailroom_needed_cnt++) { |
106 | /* | |
107 | * Flush all XMIT packets currently using HW encryption or no | |
108 | * encryption at all if the count transition is from 0 -> 1. | |
109 | */ | |
110 | synchronize_net(); | |
111 | } | |
112 | } | |
113 | ||
f9dca80b MK |
114 | static void decrease_tailroom_need_count(struct ieee80211_sub_if_data *sdata, |
115 | int delta) | |
116 | { | |
51f458d9 JB |
117 | assert_key_lock(sdata->local); |
118 | ||
f9dca80b MK |
119 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt < delta); |
120 | ||
121 | update_vlan_tailroom_need_count(sdata, -delta); | |
122 | sdata->crypto_tx_tailroom_needed_cnt -= delta; | |
123 | } | |
124 | ||
3ffc2a90 | 125 | static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key) |
11a843b7 | 126 | { |
db3bdcb9 | 127 | struct ieee80211_sub_if_data *sdata = key->sdata; |
89c91cae | 128 | struct sta_info *sta; |
fa7e1fbc | 129 | int ret = -EOPNOTSUPP; |
11a843b7 | 130 | |
3b96766f JB |
131 | might_sleep(); |
132 | ||
4619194a JB |
133 | if (key->flags & KEY_FLAG_TAINTED) { |
134 | /* If we get here, it's during resume and the key is | |
135 | * tainted so shouldn't be used/programmed any more. | |
136 | * However, its flags may still indicate that it was | |
137 | * programmed into the device (since we're in resume) | |
138 | * so clear that flag now to avoid trying to remove | |
139 | * it again later. | |
140 | */ | |
092c4098 AW |
141 | if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE && |
142 | !(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC | | |
143 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE | | |
144 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM))) | |
145 | increment_tailroom_need_count(sdata); | |
146 | ||
4619194a | 147 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
27b3eb9c | 148 | return -EINVAL; |
4619194a | 149 | } |
27b3eb9c | 150 | |
e31b8213 | 151 | if (!key->local->ops->set_key) |
3ffc2a90 | 152 | goto out_unsupported; |
11a843b7 | 153 | |
ad0e2b5a JB |
154 | assert_key_lock(key->local); |
155 | ||
89c91cae | 156 | sta = key->sta; |
dc822b5d | 157 | |
e31b8213 JB |
158 | /* |
159 | * If this is a per-STA GTK, check if it | |
160 | * is supported; if not, return. | |
161 | */ | |
162 | if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) && | |
30686bf7 | 163 | !ieee80211_hw_check(&key->local->hw, SUPPORTS_PER_STA_GTK)) |
e31b8213 JB |
164 | goto out_unsupported; |
165 | ||
89c91cae JB |
166 | if (sta && !sta->uploaded) |
167 | goto out_unsupported; | |
168 | ||
18890d4b HS |
169 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
170 | /* | |
171 | * The driver doesn't know anything about VLAN interfaces. | |
172 | * Hence, don't send GTKs for VLAN interfaces to the driver. | |
173 | */ | |
78ad2341 AW |
174 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) { |
175 | ret = 1; | |
18890d4b | 176 | goto out_unsupported; |
78ad2341 | 177 | } |
18890d4b | 178 | } |
11a843b7 | 179 | |
89c91cae JB |
180 | ret = drv_set_key(key->local, SET_KEY, sdata, |
181 | sta ? &sta->sta : NULL, &key->conf); | |
11a843b7 | 182 | |
e31b8213 | 183 | if (!ret) { |
11a843b7 | 184 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
3bff1865 | 185 | |
092c4098 AW |
186 | if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC | |
187 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE | | |
188 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM))) | |
f9dca80b | 189 | decrease_tailroom_need_count(sdata, 1); |
3bff1865 | 190 | |
077a9154 AN |
191 | WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) && |
192 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)); | |
193 | ||
9de18d81 DS |
194 | WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_MIC_SPACE) && |
195 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)); | |
196 | ||
e31b8213 JB |
197 | return 0; |
198 | } | |
11a843b7 | 199 | |
fa7e1fbc | 200 | if (ret != -ENOSPC && ret != -EOPNOTSUPP && ret != 1) |
bdcbd8e0 | 201 | sdata_err(sdata, |
0fb9a9ec | 202 | "failed to set key (%d, %pM) to hardware (%d)\n", |
89c91cae JB |
203 | key->conf.keyidx, |
204 | sta ? sta->sta.addr : bcast_addr, ret); | |
3ffc2a90 | 205 | |
e31b8213 JB |
206 | out_unsupported: |
207 | switch (key->conf.cipher) { | |
208 | case WLAN_CIPHER_SUITE_WEP40: | |
209 | case WLAN_CIPHER_SUITE_WEP104: | |
210 | case WLAN_CIPHER_SUITE_TKIP: | |
211 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db | 212 | case WLAN_CIPHER_SUITE_CCMP_256: |
3c706b97 JC |
213 | case WLAN_CIPHER_SUITE_GCMP: |
214 | case WLAN_CIPHER_SUITE_GCMP_256: | |
e31b8213 | 215 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 216 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
217 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
218 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
fa7e1fbc JB |
219 | /* all of these we can do in software - if driver can */ |
220 | if (ret == 1) | |
221 | return 0; | |
78ad2341 | 222 | if (ieee80211_hw_check(&key->local->hw, SW_CRYPTO_CONTROL)) |
fa7e1fbc | 223 | return -EINVAL; |
e31b8213 JB |
224 | return 0; |
225 | default: | |
226 | return -EINVAL; | |
3ffc2a90 | 227 | } |
11a843b7 JB |
228 | } |
229 | ||
230 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
231 | { | |
dc822b5d | 232 | struct ieee80211_sub_if_data *sdata; |
89c91cae | 233 | struct sta_info *sta; |
11a843b7 JB |
234 | int ret; |
235 | ||
3b96766f JB |
236 | might_sleep(); |
237 | ||
db4d1169 | 238 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
239 | return; |
240 | ||
ad0e2b5a JB |
241 | assert_key_lock(key->local); |
242 | ||
243 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
11a843b7 JB |
244 | return; |
245 | ||
89c91cae | 246 | sta = key->sta; |
dc822b5d JB |
247 | sdata = key->sdata; |
248 | ||
092c4098 AW |
249 | if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC | |
250 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE | | |
251 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM))) | |
3bff1865 YAP |
252 | increment_tailroom_need_count(sdata); |
253 | ||
62872a9b | 254 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
12375ef9 | 255 | ret = drv_set_key(key->local, DISABLE_KEY, sdata, |
89c91cae | 256 | sta ? &sta->sta : NULL, &key->conf); |
11a843b7 JB |
257 | |
258 | if (ret) | |
bdcbd8e0 | 259 | sdata_err(sdata, |
0fb9a9ec | 260 | "failed to remove key (%d, %pM) from hardware (%d)\n", |
89c91cae JB |
261 | key->conf.keyidx, |
262 | sta ? sta->sta.addr : bcast_addr, ret); | |
62872a9b | 263 | } |
11a843b7 | 264 | |
a0761a30 | 265 | static int _ieee80211_set_tx_key(struct ieee80211_key *key, bool force) |
96fc6efb AW |
266 | { |
267 | struct sta_info *sta = key->sta; | |
268 | struct ieee80211_local *local = key->local; | |
96fc6efb AW |
269 | |
270 | assert_key_lock(local); | |
271 | ||
a0761a30 JB |
272 | set_sta_flag(sta, WLAN_STA_USES_ENCRYPTION); |
273 | ||
96fc6efb | 274 | sta->ptk_idx = key->conf.keyidx; |
90cc4bd6 | 275 | |
a0761a30 | 276 | if (force || !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT)) |
dc3998ec | 277 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
96fc6efb AW |
278 | ieee80211_check_fast_xmit(sta); |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
a0761a30 JB |
283 | int ieee80211_set_tx_key(struct ieee80211_key *key) |
284 | { | |
285 | return _ieee80211_set_tx_key(key, false); | |
286 | } | |
287 | ||
90cc4bd6 AW |
288 | static void ieee80211_pairwise_rekey(struct ieee80211_key *old, |
289 | struct ieee80211_key *new) | |
62872a9b | 290 | { |
90cc4bd6 AW |
291 | struct ieee80211_local *local = new->local; |
292 | struct sta_info *sta = new->sta; | |
293 | int i; | |
62872a9b | 294 | |
90cc4bd6 | 295 | assert_key_lock(local); |
62872a9b | 296 | |
90cc4bd6 AW |
297 | if (new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX) { |
298 | /* Extended Key ID key install, initial one or rekey */ | |
299 | ||
dc3998ec AW |
300 | if (sta->ptk_idx != INVALID_PTK_KEYIDX && |
301 | !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT)) { | |
90cc4bd6 AW |
302 | /* Aggregation Sessions with Extended Key ID must not |
303 | * mix MPDUs with different keyIDs within one A-MPDU. | |
3e47bf1c AW |
304 | * Tear down running Tx aggregation sessions and block |
305 | * new Rx/Tx aggregation requests during rekey to | |
dc3998ec AW |
306 | * ensure there are no A-MPDUs when the driver is not |
307 | * supporting A-MPDU key borders. (Blocking Tx only | |
308 | * would be sufficient but WLAN_STA_BLOCK_BA gets the | |
309 | * job done for the few ms we need it.) | |
90cc4bd6 AW |
310 | */ |
311 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
312 | mutex_lock(&sta->ampdu_mlme.mtx); | |
313 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
314 | ___ieee80211_stop_tx_ba_session(sta, i, | |
315 | AGG_STOP_LOCAL_REQUEST); | |
316 | mutex_unlock(&sta->ampdu_mlme.mtx); | |
317 | } | |
318 | } else if (old) { | |
319 | /* Rekey without Extended Key ID. | |
320 | * Aggregation sessions are OK when running on SW crypto. | |
321 | * A broken remote STA may cause issues not observed with HW | |
322 | * crypto, though. | |
323 | */ | |
324 | if (!(old->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
325 | return; | |
62872a9b | 326 | |
90cc4bd6 AW |
327 | /* Stop Tx till we are on the new key */ |
328 | old->flags |= KEY_FLAG_TAINTED; | |
62872a9b | 329 | ieee80211_clear_fast_xmit(sta); |
62872a9b AW |
330 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) { |
331 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
332 | ieee80211_sta_tear_down_BA_sessions(sta, | |
333 | AGG_STOP_LOCAL_REQUEST); | |
334 | } | |
62872a9b AW |
335 | if (!wiphy_ext_feature_isset(local->hw.wiphy, |
336 | NL80211_EXT_FEATURE_CAN_REPLACE_PTK0)) { | |
337 | pr_warn_ratelimited("Rekeying PTK for STA %pM but driver can't safely do that.", | |
338 | sta->sta.addr); | |
339 | /* Flushing the driver queues *may* help prevent | |
340 | * the clear text leaks and freezes. | |
341 | */ | |
90cc4bd6 | 342 | ieee80211_flush_queues(local, old->sdata, false); |
62872a9b AW |
343 | } |
344 | } | |
3b96766f JB |
345 | } |
346 | ||
347 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, | |
f7e0104c | 348 | int idx, bool uni, bool multi) |
3b96766f JB |
349 | { |
350 | struct ieee80211_key *key = NULL; | |
351 | ||
ad0e2b5a JB |
352 | assert_key_lock(sdata->local); |
353 | ||
3b96766f | 354 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) |
40b275b6 | 355 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
3b96766f | 356 | |
de5fad81 | 357 | if (uni) { |
f7e0104c | 358 | rcu_assign_pointer(sdata->default_unicast_key, key); |
17c18bf8 | 359 | ieee80211_check_fast_xmit_iface(sdata); |
ec4efc4a JB |
360 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN) |
361 | drv_set_default_unicast_key(sdata->local, sdata, idx); | |
de5fad81 YD |
362 | } |
363 | ||
f7e0104c JB |
364 | if (multi) |
365 | rcu_assign_pointer(sdata->default_multicast_key, key); | |
3b96766f | 366 | |
f7e0104c | 367 | ieee80211_debugfs_key_update_default(sdata); |
3b96766f JB |
368 | } |
369 | ||
f7e0104c JB |
370 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
371 | bool uni, bool multi) | |
3b96766f | 372 | { |
ad0e2b5a | 373 | mutex_lock(&sdata->local->key_mtx); |
f7e0104c | 374 | __ieee80211_set_default_key(sdata, idx, uni, multi); |
ad0e2b5a | 375 | mutex_unlock(&sdata->local->key_mtx); |
3b96766f JB |
376 | } |
377 | ||
3cfcf6ac JM |
378 | static void |
379 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
380 | { | |
381 | struct ieee80211_key *key = NULL; | |
382 | ||
ad0e2b5a JB |
383 | assert_key_lock(sdata->local); |
384 | ||
3cfcf6ac JM |
385 | if (idx >= NUM_DEFAULT_KEYS && |
386 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
40b275b6 | 387 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
3cfcf6ac JM |
388 | |
389 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
390 | ||
f7e0104c | 391 | ieee80211_debugfs_key_update_default(sdata); |
3cfcf6ac JM |
392 | } |
393 | ||
394 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
395 | int idx) | |
396 | { | |
ad0e2b5a | 397 | mutex_lock(&sdata->local->key_mtx); |
3cfcf6ac | 398 | __ieee80211_set_default_mgmt_key(sdata, idx); |
ad0e2b5a | 399 | mutex_unlock(&sdata->local->key_mtx); |
3cfcf6ac JM |
400 | } |
401 | ||
e5473e80 JM |
402 | static void |
403 | __ieee80211_set_default_beacon_key(struct ieee80211_sub_if_data *sdata, int idx) | |
404 | { | |
405 | struct ieee80211_key *key = NULL; | |
406 | ||
407 | assert_key_lock(sdata->local); | |
408 | ||
409 | if (idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS && | |
410 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS + | |
411 | NUM_DEFAULT_BEACON_KEYS) | |
412 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); | |
413 | ||
414 | rcu_assign_pointer(sdata->default_beacon_key, key); | |
415 | ||
416 | ieee80211_debugfs_key_update_default(sdata); | |
417 | } | |
418 | ||
419 | void ieee80211_set_default_beacon_key(struct ieee80211_sub_if_data *sdata, | |
420 | int idx) | |
421 | { | |
422 | mutex_lock(&sdata->local->key_mtx); | |
423 | __ieee80211_set_default_beacon_key(sdata, idx); | |
424 | mutex_unlock(&sdata->local->key_mtx); | |
425 | } | |
426 | ||
62872a9b | 427 | static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, |
3b8d9c29 JB |
428 | struct sta_info *sta, |
429 | bool pairwise, | |
430 | struct ieee80211_key *old, | |
431 | struct ieee80211_key *new) | |
3b96766f | 432 | { |
f7e0104c | 433 | int idx; |
90cc4bd6 | 434 | int ret = 0; |
e5473e80 | 435 | bool defunikey, defmultikey, defmgmtkey, defbeaconkey; |
3b96766f | 436 | |
5282c3ba JB |
437 | /* caller must provide at least one old/new */ |
438 | if (WARN_ON(!new && !old)) | |
62872a9b | 439 | return 0; |
5282c3ba | 440 | |
3b96766f | 441 | if (new) |
ef044763 | 442 | list_add_tail_rcu(&new->list, &sdata->key_list); |
3b96766f | 443 | |
2475b1cc | 444 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); |
3b96766f | 445 | |
90cc4bd6 AW |
446 | if (new && sta && pairwise) { |
447 | /* Unicast rekey needs special handling. With Extended Key ID | |
448 | * old is still NULL for the first rekey. | |
449 | */ | |
450 | ieee80211_pairwise_rekey(old, new); | |
451 | } | |
452 | ||
62872a9b | 453 | if (old) { |
2475b1cc | 454 | idx = old->conf.keyidx; |
90cc4bd6 AW |
455 | |
456 | if (old->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) { | |
457 | ieee80211_key_disable_hw_accel(old); | |
458 | ||
459 | if (new) | |
460 | ret = ieee80211_key_enable_hw_accel(new); | |
461 | } | |
62872a9b | 462 | } else { |
40b5a0f8 | 463 | /* new must be provided in case old is not */ |
2475b1cc | 464 | idx = new->conf.keyidx; |
40b5a0f8 | 465 | if (!new->local->wowlan) |
62872a9b | 466 | ret = ieee80211_key_enable_hw_accel(new); |
62872a9b AW |
467 | } |
468 | ||
469 | if (ret) | |
470 | return ret; | |
3b96766f | 471 | |
2475b1cc MS |
472 | if (sta) { |
473 | if (pairwise) { | |
474 | rcu_assign_pointer(sta->ptk[idx], new); | |
96fc6efb | 475 | if (new && |
a0761a30 JB |
476 | !(new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX)) |
477 | _ieee80211_set_tx_key(new, true); | |
2475b1cc MS |
478 | } else { |
479 | rcu_assign_pointer(sta->gtk[idx], new); | |
2475b1cc | 480 | } |
96fc6efb AW |
481 | /* Only needed for transition from no key -> key. |
482 | * Still triggers unnecessary when using Extended Key ID | |
483 | * and installing the second key ID the first time. | |
484 | */ | |
485 | if (new && !old) | |
62872a9b | 486 | ieee80211_check_fast_rx(sta); |
2475b1cc | 487 | } else { |
40b275b6 JB |
488 | defunikey = old && |
489 | old == key_mtx_dereference(sdata->local, | |
490 | sdata->default_unicast_key); | |
491 | defmultikey = old && | |
492 | old == key_mtx_dereference(sdata->local, | |
493 | sdata->default_multicast_key); | |
494 | defmgmtkey = old && | |
495 | old == key_mtx_dereference(sdata->local, | |
496 | sdata->default_mgmt_key); | |
e5473e80 JM |
497 | defbeaconkey = old && |
498 | old == key_mtx_dereference(sdata->local, | |
499 | sdata->default_beacon_key); | |
3b96766f | 500 | |
f7e0104c JB |
501 | if (defunikey && !new) |
502 | __ieee80211_set_default_key(sdata, -1, true, false); | |
503 | if (defmultikey && !new) | |
504 | __ieee80211_set_default_key(sdata, -1, false, true); | |
3cfcf6ac JM |
505 | if (defmgmtkey && !new) |
506 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
e5473e80 JM |
507 | if (defbeaconkey && !new) |
508 | __ieee80211_set_default_beacon_key(sdata, -1); | |
3b96766f JB |
509 | |
510 | rcu_assign_pointer(sdata->keys[idx], new); | |
f7e0104c JB |
511 | if (defunikey && new) |
512 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
513 | true, false); | |
514 | if (defmultikey && new) | |
515 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
516 | false, true); | |
3cfcf6ac JM |
517 | if (defmgmtkey && new) |
518 | __ieee80211_set_default_mgmt_key(sdata, | |
519 | new->conf.keyidx); | |
e5473e80 JM |
520 | if (defbeaconkey && new) |
521 | __ieee80211_set_default_beacon_key(sdata, | |
522 | new->conf.keyidx); | |
3b96766f JB |
523 | } |
524 | ||
b5c34f66 | 525 | if (old) |
ef044763 | 526 | list_del_rcu(&old->list); |
62872a9b AW |
527 | |
528 | return 0; | |
11a843b7 JB |
529 | } |
530 | ||
2475b1cc MS |
531 | struct ieee80211_key * |
532 | ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, | |
533 | const u8 *key_data, | |
534 | size_t seq_len, const u8 *seq, | |
535 | const struct ieee80211_cipher_scheme *cs) | |
1f5a7e47 JB |
536 | { |
537 | struct ieee80211_key *key; | |
1ac62ba7 | 538 | int i, j, err; |
1f5a7e47 | 539 | |
e5473e80 JM |
540 | if (WARN_ON(idx < 0 || |
541 | idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS + | |
542 | NUM_DEFAULT_BEACON_KEYS)) | |
8c5bb1fa | 543 | return ERR_PTR(-EINVAL); |
11a843b7 JB |
544 | |
545 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 | 546 | if (!key) |
1ac62ba7 | 547 | return ERR_PTR(-ENOMEM); |
11a843b7 JB |
548 | |
549 | /* | |
550 | * Default to software encryption; we'll later upload the | |
551 | * key to the hardware if possible. | |
552 | */ | |
11a843b7 JB |
553 | key->conf.flags = 0; |
554 | key->flags = 0; | |
555 | ||
97359d12 | 556 | key->conf.cipher = cipher; |
11a843b7 JB |
557 | key->conf.keyidx = idx; |
558 | key->conf.keylen = key_len; | |
97359d12 JB |
559 | switch (cipher) { |
560 | case WLAN_CIPHER_SUITE_WEP40: | |
561 | case WLAN_CIPHER_SUITE_WEP104: | |
4325f6ca JB |
562 | key->conf.iv_len = IEEE80211_WEP_IV_LEN; |
563 | key->conf.icv_len = IEEE80211_WEP_ICV_LEN; | |
76708dee | 564 | break; |
97359d12 | 565 | case WLAN_CIPHER_SUITE_TKIP: |
4325f6ca JB |
566 | key->conf.iv_len = IEEE80211_TKIP_IV_LEN; |
567 | key->conf.icv_len = IEEE80211_TKIP_ICV_LEN; | |
9f26a952 | 568 | if (seq) { |
5a306f58 | 569 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
faa8fdc8 JM |
570 | key->u.tkip.rx[i].iv32 = |
571 | get_unaligned_le32(&seq[2]); | |
572 | key->u.tkip.rx[i].iv16 = | |
573 | get_unaligned_le16(seq); | |
574 | } | |
575 | } | |
523b02ea | 576 | spin_lock_init(&key->u.tkip.txlock); |
76708dee | 577 | break; |
97359d12 | 578 | case WLAN_CIPHER_SUITE_CCMP: |
4325f6ca JB |
579 | key->conf.iv_len = IEEE80211_CCMP_HDR_LEN; |
580 | key->conf.icv_len = IEEE80211_CCMP_MIC_LEN; | |
9f26a952 | 581 | if (seq) { |
5a306f58 | 582 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) |
4325f6ca | 583 | for (j = 0; j < IEEE80211_CCMP_PN_LEN; j++) |
faa8fdc8 | 584 | key->u.ccmp.rx_pn[i][j] = |
4325f6ca | 585 | seq[IEEE80211_CCMP_PN_LEN - j - 1]; |
faa8fdc8 | 586 | } |
11a843b7 JB |
587 | /* |
588 | * Initialize AES key state here as an optimization so that | |
589 | * it does not need to be initialized for every packet. | |
590 | */ | |
2b2ba0db JM |
591 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt( |
592 | key_data, key_len, IEEE80211_CCMP_MIC_LEN); | |
593 | if (IS_ERR(key->u.ccmp.tfm)) { | |
594 | err = PTR_ERR(key->u.ccmp.tfm); | |
595 | kfree(key); | |
596 | return ERR_PTR(err); | |
597 | } | |
598 | break; | |
599 | case WLAN_CIPHER_SUITE_CCMP_256: | |
600 | key->conf.iv_len = IEEE80211_CCMP_256_HDR_LEN; | |
601 | key->conf.icv_len = IEEE80211_CCMP_256_MIC_LEN; | |
602 | for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++) | |
603 | for (j = 0; j < IEEE80211_CCMP_256_PN_LEN; j++) | |
604 | key->u.ccmp.rx_pn[i][j] = | |
605 | seq[IEEE80211_CCMP_256_PN_LEN - j - 1]; | |
606 | /* Initialize AES key state here as an optimization so that | |
607 | * it does not need to be initialized for every packet. | |
608 | */ | |
609 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt( | |
610 | key_data, key_len, IEEE80211_CCMP_256_MIC_LEN); | |
1ac62ba7 BH |
611 | if (IS_ERR(key->u.ccmp.tfm)) { |
612 | err = PTR_ERR(key->u.ccmp.tfm); | |
3b96766f | 613 | kfree(key); |
1f951a7f | 614 | return ERR_PTR(err); |
11a843b7 | 615 | } |
60ae0f20 JB |
616 | break; |
617 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
56c52da2 | 618 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
60ae0f20 | 619 | key->conf.iv_len = 0; |
56c52da2 JM |
620 | if (cipher == WLAN_CIPHER_SUITE_AES_CMAC) |
621 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
622 | else | |
623 | key->conf.icv_len = sizeof(struct ieee80211_mmie_16); | |
60ae0f20 | 624 | if (seq) |
4325f6ca | 625 | for (j = 0; j < IEEE80211_CMAC_PN_LEN; j++) |
0f927323 | 626 | key->u.aes_cmac.rx_pn[j] = |
4325f6ca | 627 | seq[IEEE80211_CMAC_PN_LEN - j - 1]; |
3cfcf6ac JM |
628 | /* |
629 | * Initialize AES key state here as an optimization so that | |
630 | * it does not need to be initialized for every packet. | |
631 | */ | |
632 | key->u.aes_cmac.tfm = | |
56c52da2 | 633 | ieee80211_aes_cmac_key_setup(key_data, key_len); |
1ac62ba7 BH |
634 | if (IS_ERR(key->u.aes_cmac.tfm)) { |
635 | err = PTR_ERR(key->u.aes_cmac.tfm); | |
3cfcf6ac | 636 | kfree(key); |
1f951a7f | 637 | return ERR_PTR(err); |
3cfcf6ac | 638 | } |
60ae0f20 | 639 | break; |
8ade538b JM |
640 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
641 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
642 | key->conf.iv_len = 0; | |
643 | key->conf.icv_len = sizeof(struct ieee80211_mmie_16); | |
644 | if (seq) | |
645 | for (j = 0; j < IEEE80211_GMAC_PN_LEN; j++) | |
646 | key->u.aes_gmac.rx_pn[j] = | |
647 | seq[IEEE80211_GMAC_PN_LEN - j - 1]; | |
648 | /* Initialize AES key state here as an optimization so that | |
649 | * it does not need to be initialized for every packet. | |
650 | */ | |
651 | key->u.aes_gmac.tfm = | |
652 | ieee80211_aes_gmac_key_setup(key_data, key_len); | |
653 | if (IS_ERR(key->u.aes_gmac.tfm)) { | |
654 | err = PTR_ERR(key->u.aes_gmac.tfm); | |
655 | kfree(key); | |
656 | return ERR_PTR(err); | |
657 | } | |
658 | break; | |
00b9cfa3 JM |
659 | case WLAN_CIPHER_SUITE_GCMP: |
660 | case WLAN_CIPHER_SUITE_GCMP_256: | |
661 | key->conf.iv_len = IEEE80211_GCMP_HDR_LEN; | |
662 | key->conf.icv_len = IEEE80211_GCMP_MIC_LEN; | |
663 | for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++) | |
664 | for (j = 0; j < IEEE80211_GCMP_PN_LEN; j++) | |
665 | key->u.gcmp.rx_pn[i][j] = | |
666 | seq[IEEE80211_GCMP_PN_LEN - j - 1]; | |
667 | /* Initialize AES key state here as an optimization so that | |
668 | * it does not need to be initialized for every packet. | |
669 | */ | |
670 | key->u.gcmp.tfm = ieee80211_aes_gcm_key_setup_encrypt(key_data, | |
671 | key_len); | |
672 | if (IS_ERR(key->u.gcmp.tfm)) { | |
673 | err = PTR_ERR(key->u.gcmp.tfm); | |
674 | kfree(key); | |
675 | return ERR_PTR(err); | |
676 | } | |
677 | break; | |
2475b1cc MS |
678 | default: |
679 | if (cs) { | |
e3a55b53 JB |
680 | if (seq_len && seq_len != cs->pn_len) { |
681 | kfree(key); | |
682 | return ERR_PTR(-EINVAL); | |
683 | } | |
2475b1cc MS |
684 | |
685 | key->conf.iv_len = cs->hdr_len; | |
686 | key->conf.icv_len = cs->mic_len; | |
687 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) | |
e3a55b53 | 688 | for (j = 0; j < seq_len; j++) |
2475b1cc | 689 | key->u.gen.rx_pn[i][j] = |
e3a55b53 | 690 | seq[seq_len - j - 1]; |
c7ef38e0 | 691 | key->flags |= KEY_FLAG_CIPHER_SCHEME; |
2475b1cc | 692 | } |
3cfcf6ac | 693 | } |
60ae0f20 JB |
694 | memcpy(key->conf.key, key_data, key_len); |
695 | INIT_LIST_HEAD(&key->list); | |
3cfcf6ac | 696 | |
db4d1169 JB |
697 | return key; |
698 | } | |
11a843b7 | 699 | |
79cf2dfa JB |
700 | static void ieee80211_key_free_common(struct ieee80211_key *key) |
701 | { | |
00b9cfa3 JM |
702 | switch (key->conf.cipher) { |
703 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db | 704 | case WLAN_CIPHER_SUITE_CCMP_256: |
79cf2dfa | 705 | ieee80211_aes_key_free(key->u.ccmp.tfm); |
00b9cfa3 JM |
706 | break; |
707 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
56c52da2 | 708 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
79cf2dfa | 709 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); |
00b9cfa3 | 710 | break; |
8ade538b JM |
711 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
712 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
713 | ieee80211_aes_gmac_key_free(key->u.aes_gmac.tfm); | |
714 | break; | |
00b9cfa3 JM |
715 | case WLAN_CIPHER_SUITE_GCMP: |
716 | case WLAN_CIPHER_SUITE_GCMP_256: | |
717 | ieee80211_aes_gcm_key_free(key->u.gcmp.tfm); | |
718 | break; | |
719 | } | |
453431a5 | 720 | kfree_sensitive(key); |
79cf2dfa JB |
721 | } |
722 | ||
6d10e46b JB |
723 | static void __ieee80211_key_destroy(struct ieee80211_key *key, |
724 | bool delay_tailroom) | |
ad0e2b5a | 725 | { |
3bff1865 | 726 | if (key->local) { |
8d1f7ecd JB |
727 | struct ieee80211_sub_if_data *sdata = key->sdata; |
728 | ||
32162a4d | 729 | ieee80211_debugfs_key_remove(key); |
8d1f7ecd JB |
730 | |
731 | if (delay_tailroom) { | |
732 | /* see ieee80211_delayed_tailroom_dec */ | |
733 | sdata->crypto_tx_tailroom_pending_dec++; | |
734 | schedule_delayed_work(&sdata->dec_tailroom_needed_wk, | |
735 | HZ/2); | |
736 | } else { | |
f9dca80b | 737 | decrease_tailroom_need_count(sdata, 1); |
8d1f7ecd | 738 | } |
3bff1865 | 739 | } |
ad0e2b5a | 740 | |
79cf2dfa JB |
741 | ieee80211_key_free_common(key); |
742 | } | |
743 | ||
6d10e46b JB |
744 | static void ieee80211_key_destroy(struct ieee80211_key *key, |
745 | bool delay_tailroom) | |
746 | { | |
747 | if (!key) | |
748 | return; | |
749 | ||
750 | /* | |
ef044763 EP |
751 | * Synchronize so the TX path and rcu key iterators |
752 | * can no longer be using this key before we free/remove it. | |
6d10e46b JB |
753 | */ |
754 | synchronize_net(); | |
755 | ||
756 | __ieee80211_key_destroy(key, delay_tailroom); | |
757 | } | |
758 | ||
79cf2dfa JB |
759 | void ieee80211_key_free_unused(struct ieee80211_key *key) |
760 | { | |
761 | WARN_ON(key->sdata || key->local); | |
762 | ieee80211_key_free_common(key); | |
ad0e2b5a JB |
763 | } |
764 | ||
cfbb0d90 JB |
765 | static bool ieee80211_key_identical(struct ieee80211_sub_if_data *sdata, |
766 | struct ieee80211_key *old, | |
767 | struct ieee80211_key *new) | |
768 | { | |
769 | u8 tkip_old[WLAN_KEY_LEN_TKIP], tkip_new[WLAN_KEY_LEN_TKIP]; | |
770 | u8 *tk_old, *tk_new; | |
771 | ||
772 | if (!old || new->conf.keylen != old->conf.keylen) | |
773 | return false; | |
774 | ||
775 | tk_old = old->conf.key; | |
776 | tk_new = new->conf.key; | |
777 | ||
778 | /* | |
779 | * In station mode, don't compare the TX MIC key, as it's never used | |
780 | * and offloaded rekeying may not care to send it to the host. This | |
781 | * is the case in iwlwifi, for example. | |
782 | */ | |
783 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
784 | new->conf.cipher == WLAN_CIPHER_SUITE_TKIP && | |
785 | new->conf.keylen == WLAN_KEY_LEN_TKIP && | |
786 | !(new->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) { | |
787 | memcpy(tkip_old, tk_old, WLAN_KEY_LEN_TKIP); | |
788 | memcpy(tkip_new, tk_new, WLAN_KEY_LEN_TKIP); | |
789 | memset(tkip_old + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8); | |
790 | memset(tkip_new + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8); | |
791 | tk_old = tkip_old; | |
792 | tk_new = tkip_new; | |
793 | } | |
794 | ||
795 | return !crypto_memneq(tk_old, tk_new, new->conf.keylen); | |
796 | } | |
797 | ||
3ffc2a90 JB |
798 | int ieee80211_key_link(struct ieee80211_key *key, |
799 | struct ieee80211_sub_if_data *sdata, | |
800 | struct sta_info *sta) | |
db4d1169 | 801 | { |
94034c40 | 802 | static atomic_t key_color = ATOMIC_INIT(0); |
db4d1169 | 803 | struct ieee80211_key *old_key; |
133bf90d MP |
804 | int idx = key->conf.keyidx; |
805 | bool pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; | |
806 | /* | |
807 | * We want to delay tailroom updates only for station - in that | |
808 | * case it helps roaming speed, but in other cases it hurts and | |
809 | * can cause warnings to appear. | |
810 | */ | |
811 | bool delay_tailroom = sdata->vif.type == NL80211_IFTYPE_STATION; | |
96fc6efb | 812 | int ret = -EOPNOTSUPP; |
db4d1169 | 813 | |
ad0e2b5a | 814 | mutex_lock(&sdata->local->key_mtx); |
3b96766f | 815 | |
96fc6efb AW |
816 | if (sta && pairwise) { |
817 | struct ieee80211_key *alt_key; | |
818 | ||
2475b1cc | 819 | old_key = key_mtx_dereference(sdata->local, sta->ptk[idx]); |
96fc6efb AW |
820 | alt_key = key_mtx_dereference(sdata->local, sta->ptk[idx ^ 1]); |
821 | ||
822 | /* The rekey code assumes that the old and new key are using | |
823 | * the same cipher. Enforce the assumption for pairwise keys. | |
824 | */ | |
1c955973 JB |
825 | if ((alt_key && alt_key->conf.cipher != key->conf.cipher) || |
826 | (old_key && old_key->conf.cipher != key->conf.cipher)) | |
96fc6efb AW |
827 | goto out; |
828 | } else if (sta) { | |
40b275b6 | 829 | old_key = key_mtx_dereference(sdata->local, sta->gtk[idx]); |
96fc6efb | 830 | } else { |
40b275b6 | 831 | old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
96fc6efb AW |
832 | } |
833 | ||
834 | /* Non-pairwise keys must also not switch the cipher on rekey */ | |
835 | if (!pairwise) { | |
753a9a72 | 836 | if (old_key && old_key->conf.cipher != key->conf.cipher) |
96fc6efb AW |
837 | goto out; |
838 | } | |
db4d1169 | 839 | |
fdf7cb41 JB |
840 | /* |
841 | * Silently accept key re-installation without really installing the | |
842 | * new version of the key to avoid nonce reuse or replay issues. | |
843 | */ | |
cfbb0d90 | 844 | if (ieee80211_key_identical(sdata, old_key, key)) { |
fdf7cb41 JB |
845 | ieee80211_key_free_unused(key); |
846 | ret = 0; | |
847 | goto out; | |
848 | } | |
849 | ||
850 | key->local = sdata->local; | |
851 | key->sdata = sdata; | |
852 | key->sta = sta; | |
853 | ||
94034c40 MV |
854 | /* |
855 | * Assign a unique ID to every key so we can easily prevent mixed | |
856 | * key and fragment cache attacks. | |
857 | */ | |
858 | key->color = atomic_inc_return(&key_color); | |
859 | ||
3bff1865 YAP |
860 | increment_tailroom_need_count(sdata); |
861 | ||
62872a9b | 862 | ret = ieee80211_key_replace(sdata, sta, pairwise, old_key, key); |
db4d1169 | 863 | |
62872a9b AW |
864 | if (!ret) { |
865 | ieee80211_debugfs_key_add(key); | |
866 | ieee80211_key_destroy(old_key, delay_tailroom); | |
27b3eb9c | 867 | } else { |
62872a9b | 868 | ieee80211_key_free(key, delay_tailroom); |
27b3eb9c | 869 | } |
79cf2dfa | 870 | |
fdf7cb41 | 871 | out: |
ad0e2b5a | 872 | mutex_unlock(&sdata->local->key_mtx); |
3ffc2a90 JB |
873 | |
874 | return ret; | |
1f5a7e47 JB |
875 | } |
876 | ||
3b8d9c29 | 877 | void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom) |
1f5a7e47 | 878 | { |
5c0c3641 JB |
879 | if (!key) |
880 | return; | |
881 | ||
3b96766f JB |
882 | /* |
883 | * Replace key with nothingness if it was ever used. | |
884 | */ | |
3a245766 | 885 | if (key->sdata) |
3b8d9c29 | 886 | ieee80211_key_replace(key->sdata, key->sta, |
e31b8213 JB |
887 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, |
888 | key, NULL); | |
3b8d9c29 | 889 | ieee80211_key_destroy(key, delay_tailroom); |
3b96766f | 890 | } |
d4e46a3d | 891 | |
624ff4b2 | 892 | void ieee80211_reenable_keys(struct ieee80211_sub_if_data *sdata) |
3a245766 JB |
893 | { |
894 | struct ieee80211_key *key; | |
f9dca80b | 895 | struct ieee80211_sub_if_data *vlan; |
11a843b7 | 896 | |
a05829a7 | 897 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
11a843b7 | 898 | |
f9dca80b MK |
899 | mutex_lock(&sdata->local->key_mtx); |
900 | ||
901 | sdata->crypto_tx_tailroom_needed_cnt = 0; | |
624ff4b2 | 902 | sdata->crypto_tx_tailroom_pending_dec = 0; |
f9dca80b MK |
903 | |
904 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
624ff4b2 | 905 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { |
f9dca80b | 906 | vlan->crypto_tx_tailroom_needed_cnt = 0; |
624ff4b2 LC |
907 | vlan->crypto_tx_tailroom_pending_dec = 0; |
908 | } | |
909 | } | |
910 | ||
911 | if (ieee80211_sdata_running(sdata)) { | |
912 | list_for_each_entry(key, &sdata->key_list, list) { | |
913 | increment_tailroom_need_count(sdata); | |
914 | ieee80211_key_enable_hw_accel(key); | |
915 | } | |
f9dca80b MK |
916 | } |
917 | ||
918 | mutex_unlock(&sdata->local->key_mtx); | |
919 | } | |
920 | ||
830af02f JB |
921 | void ieee80211_iter_keys(struct ieee80211_hw *hw, |
922 | struct ieee80211_vif *vif, | |
923 | void (*iter)(struct ieee80211_hw *hw, | |
924 | struct ieee80211_vif *vif, | |
925 | struct ieee80211_sta *sta, | |
926 | struct ieee80211_key_conf *key, | |
927 | void *data), | |
928 | void *iter_data) | |
929 | { | |
930 | struct ieee80211_local *local = hw_to_local(hw); | |
27b3eb9c | 931 | struct ieee80211_key *key, *tmp; |
830af02f JB |
932 | struct ieee80211_sub_if_data *sdata; |
933 | ||
a05829a7 | 934 | lockdep_assert_wiphy(hw->wiphy); |
830af02f JB |
935 | |
936 | mutex_lock(&local->key_mtx); | |
937 | if (vif) { | |
938 | sdata = vif_to_sdata(vif); | |
27b3eb9c | 939 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
830af02f JB |
940 | iter(hw, &sdata->vif, |
941 | key->sta ? &key->sta->sta : NULL, | |
942 | &key->conf, iter_data); | |
943 | } else { | |
944 | list_for_each_entry(sdata, &local->interfaces, list) | |
27b3eb9c JB |
945 | list_for_each_entry_safe(key, tmp, |
946 | &sdata->key_list, list) | |
830af02f JB |
947 | iter(hw, &sdata->vif, |
948 | key->sta ? &key->sta->sta : NULL, | |
949 | &key->conf, iter_data); | |
950 | } | |
951 | mutex_unlock(&local->key_mtx); | |
952 | } | |
953 | EXPORT_SYMBOL(ieee80211_iter_keys); | |
954 | ||
ef044763 EP |
955 | static void |
956 | _ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, | |
957 | struct ieee80211_sub_if_data *sdata, | |
958 | void (*iter)(struct ieee80211_hw *hw, | |
959 | struct ieee80211_vif *vif, | |
960 | struct ieee80211_sta *sta, | |
961 | struct ieee80211_key_conf *key, | |
962 | void *data), | |
963 | void *iter_data) | |
964 | { | |
965 | struct ieee80211_key *key; | |
966 | ||
967 | list_for_each_entry_rcu(key, &sdata->key_list, list) { | |
968 | /* skip keys of station in removal process */ | |
969 | if (key->sta && key->sta->removed) | |
970 | continue; | |
971 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
972 | continue; | |
973 | ||
974 | iter(hw, &sdata->vif, | |
975 | key->sta ? &key->sta->sta : NULL, | |
976 | &key->conf, iter_data); | |
977 | } | |
978 | } | |
979 | ||
980 | void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, | |
981 | struct ieee80211_vif *vif, | |
982 | void (*iter)(struct ieee80211_hw *hw, | |
983 | struct ieee80211_vif *vif, | |
984 | struct ieee80211_sta *sta, | |
985 | struct ieee80211_key_conf *key, | |
986 | void *data), | |
987 | void *iter_data) | |
988 | { | |
989 | struct ieee80211_local *local = hw_to_local(hw); | |
990 | struct ieee80211_sub_if_data *sdata; | |
991 | ||
992 | if (vif) { | |
993 | sdata = vif_to_sdata(vif); | |
994 | _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data); | |
995 | } else { | |
996 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
997 | _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data); | |
998 | } | |
999 | } | |
1000 | EXPORT_SYMBOL(ieee80211_iter_keys_rcu); | |
1001 | ||
7907c7d3 JB |
1002 | static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata, |
1003 | struct list_head *keys) | |
3b96766f JB |
1004 | { |
1005 | struct ieee80211_key *key, *tmp; | |
3b96766f | 1006 | |
f9dca80b MK |
1007 | decrease_tailroom_need_count(sdata, |
1008 | sdata->crypto_tx_tailroom_pending_dec); | |
8d1f7ecd JB |
1009 | sdata->crypto_tx_tailroom_pending_dec = 0; |
1010 | ||
3cfcf6ac | 1011 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
e5473e80 | 1012 | ieee80211_debugfs_key_remove_beacon_default(sdata); |
3b96766f | 1013 | |
6d10e46b JB |
1014 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) { |
1015 | ieee80211_key_replace(key->sdata, key->sta, | |
1016 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, | |
1017 | key, NULL); | |
7907c7d3 | 1018 | list_add_tail(&key->list, keys); |
6d10e46b | 1019 | } |
3b96766f | 1020 | |
f7e0104c | 1021 | ieee80211_debugfs_key_update_default(sdata); |
7907c7d3 | 1022 | } |
f7e0104c | 1023 | |
7907c7d3 JB |
1024 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata, |
1025 | bool force_synchronize) | |
1026 | { | |
1027 | struct ieee80211_local *local = sdata->local; | |
1028 | struct ieee80211_sub_if_data *vlan; | |
f9dca80b | 1029 | struct ieee80211_sub_if_data *master; |
7907c7d3 JB |
1030 | struct ieee80211_key *key, *tmp; |
1031 | LIST_HEAD(keys); | |
1032 | ||
1033 | cancel_delayed_work_sync(&sdata->dec_tailroom_needed_wk); | |
1034 | ||
1035 | mutex_lock(&local->key_mtx); | |
1036 | ||
1037 | ieee80211_free_keys_iface(sdata, &keys); | |
1038 | ||
1039 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
1040 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
1041 | ieee80211_free_keys_iface(vlan, &keys); | |
6d10e46b JB |
1042 | } |
1043 | ||
7907c7d3 JB |
1044 | if (!list_empty(&keys) || force_synchronize) |
1045 | synchronize_net(); | |
1046 | list_for_each_entry_safe(key, tmp, &keys, list) | |
1047 | __ieee80211_key_destroy(key, false); | |
1048 | ||
f9dca80b MK |
1049 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
1050 | if (sdata->bss) { | |
1051 | master = container_of(sdata->bss, | |
1052 | struct ieee80211_sub_if_data, | |
1053 | u.ap); | |
1054 | ||
1055 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt != | |
1056 | master->crypto_tx_tailroom_needed_cnt); | |
1057 | } | |
1058 | } else { | |
1059 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt || | |
1060 | sdata->crypto_tx_tailroom_pending_dec); | |
1061 | } | |
1062 | ||
7907c7d3 JB |
1063 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
1064 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
1065 | WARN_ON_ONCE(vlan->crypto_tx_tailroom_needed_cnt || | |
1066 | vlan->crypto_tx_tailroom_pending_dec); | |
1067 | } | |
8d1f7ecd | 1068 | |
7907c7d3 | 1069 | mutex_unlock(&local->key_mtx); |
11a843b7 | 1070 | } |
c68f4b89 | 1071 | |
6d10e46b JB |
1072 | void ieee80211_free_sta_keys(struct ieee80211_local *local, |
1073 | struct sta_info *sta) | |
1074 | { | |
c8782078 | 1075 | struct ieee80211_key *key; |
6d10e46b JB |
1076 | int i; |
1077 | ||
1078 | mutex_lock(&local->key_mtx); | |
28a9bc68 | 1079 | for (i = 0; i < ARRAY_SIZE(sta->gtk); i++) { |
6d10e46b JB |
1080 | key = key_mtx_dereference(local, sta->gtk[i]); |
1081 | if (!key) | |
1082 | continue; | |
1083 | ieee80211_key_replace(key->sdata, key->sta, | |
1084 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, | |
1085 | key, NULL); | |
133bf90d MP |
1086 | __ieee80211_key_destroy(key, key->sdata->vif.type == |
1087 | NL80211_IFTYPE_STATION); | |
6d10e46b JB |
1088 | } |
1089 | ||
2475b1cc MS |
1090 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
1091 | key = key_mtx_dereference(local, sta->ptk[i]); | |
1092 | if (!key) | |
1093 | continue; | |
6d10e46b JB |
1094 | ieee80211_key_replace(key->sdata, key->sta, |
1095 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, | |
1096 | key, NULL); | |
133bf90d MP |
1097 | __ieee80211_key_destroy(key, key->sdata->vif.type == |
1098 | NL80211_IFTYPE_STATION); | |
c8782078 | 1099 | } |
6d10e46b JB |
1100 | |
1101 | mutex_unlock(&local->key_mtx); | |
1102 | } | |
1103 | ||
8d1f7ecd JB |
1104 | void ieee80211_delayed_tailroom_dec(struct work_struct *wk) |
1105 | { | |
1106 | struct ieee80211_sub_if_data *sdata; | |
1107 | ||
1108 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
1109 | dec_tailroom_needed_wk.work); | |
1110 | ||
1111 | /* | |
1112 | * The reason for the delayed tailroom needed decrementing is to | |
1113 | * make roaming faster: during roaming, all keys are first deleted | |
1114 | * and then new keys are installed. The first new key causes the | |
1115 | * crypto_tx_tailroom_needed_cnt to go from 0 to 1, which invokes | |
1116 | * the cost of synchronize_net() (which can be slow). Avoid this | |
1117 | * by deferring the crypto_tx_tailroom_needed_cnt decrementing on | |
1118 | * key removal for a while, so if we roam the value is larger than | |
1119 | * zero and no 0->1 transition happens. | |
1120 | * | |
1121 | * The cost is that if the AP switching was from an AP with keys | |
1122 | * to one without, we still allocate tailroom while it would no | |
1123 | * longer be needed. However, in the typical (fast) roaming case | |
1124 | * within an ESS this usually won't happen. | |
1125 | */ | |
1126 | ||
1127 | mutex_lock(&sdata->local->key_mtx); | |
f9dca80b MK |
1128 | decrease_tailroom_need_count(sdata, |
1129 | sdata->crypto_tx_tailroom_pending_dec); | |
8d1f7ecd JB |
1130 | sdata->crypto_tx_tailroom_pending_dec = 0; |
1131 | mutex_unlock(&sdata->local->key_mtx); | |
1132 | } | |
c68f4b89 JB |
1133 | |
1134 | void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, | |
1135 | const u8 *replay_ctr, gfp_t gfp) | |
1136 | { | |
1137 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1138 | ||
1139 | trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr); | |
1140 | ||
1141 | cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp); | |
1142 | } | |
1143 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify); | |
3ea542d3 | 1144 | |
3ea542d3 JB |
1145 | void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, |
1146 | int tid, struct ieee80211_key_seq *seq) | |
1147 | { | |
1148 | struct ieee80211_key *key; | |
1149 | const u8 *pn; | |
1150 | ||
1151 | key = container_of(keyconf, struct ieee80211_key, conf); | |
1152 | ||
1153 | switch (key->conf.cipher) { | |
1154 | case WLAN_CIPHER_SUITE_TKIP: | |
5a306f58 | 1155 | if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS)) |
3ea542d3 JB |
1156 | return; |
1157 | seq->tkip.iv32 = key->u.tkip.rx[tid].iv32; | |
1158 | seq->tkip.iv16 = key->u.tkip.rx[tid].iv16; | |
1159 | break; | |
1160 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db | 1161 | case WLAN_CIPHER_SUITE_CCMP_256: |
5a306f58 | 1162 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS)) |
3ea542d3 JB |
1163 | return; |
1164 | if (tid < 0) | |
5a306f58 | 1165 | pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS]; |
3ea542d3 JB |
1166 | else |
1167 | pn = key->u.ccmp.rx_pn[tid]; | |
4325f6ca | 1168 | memcpy(seq->ccmp.pn, pn, IEEE80211_CCMP_PN_LEN); |
3ea542d3 JB |
1169 | break; |
1170 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
56c52da2 | 1171 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
3ea542d3 JB |
1172 | if (WARN_ON(tid != 0)) |
1173 | return; | |
1174 | pn = key->u.aes_cmac.rx_pn; | |
4325f6ca | 1175 | memcpy(seq->aes_cmac.pn, pn, IEEE80211_CMAC_PN_LEN); |
3ea542d3 | 1176 | break; |
8ade538b JM |
1177 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1178 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1179 | if (WARN_ON(tid != 0)) | |
1180 | return; | |
1181 | pn = key->u.aes_gmac.rx_pn; | |
1182 | memcpy(seq->aes_gmac.pn, pn, IEEE80211_GMAC_PN_LEN); | |
1183 | break; | |
00b9cfa3 JM |
1184 | case WLAN_CIPHER_SUITE_GCMP: |
1185 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1186 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS)) | |
1187 | return; | |
1188 | if (tid < 0) | |
1189 | pn = key->u.gcmp.rx_pn[IEEE80211_NUM_TIDS]; | |
1190 | else | |
1191 | pn = key->u.gcmp.rx_pn[tid]; | |
1192 | memcpy(seq->gcmp.pn, pn, IEEE80211_GCMP_PN_LEN); | |
1193 | break; | |
3ea542d3 JB |
1194 | } |
1195 | } | |
1196 | EXPORT_SYMBOL(ieee80211_get_key_rx_seq); | |
27b3eb9c | 1197 | |
27b3eb9c JB |
1198 | void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, |
1199 | int tid, struct ieee80211_key_seq *seq) | |
1200 | { | |
1201 | struct ieee80211_key *key; | |
1202 | u8 *pn; | |
1203 | ||
1204 | key = container_of(keyconf, struct ieee80211_key, conf); | |
1205 | ||
1206 | switch (key->conf.cipher) { | |
1207 | case WLAN_CIPHER_SUITE_TKIP: | |
1208 | if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS)) | |
1209 | return; | |
1210 | key->u.tkip.rx[tid].iv32 = seq->tkip.iv32; | |
1211 | key->u.tkip.rx[tid].iv16 = seq->tkip.iv16; | |
1212 | break; | |
1213 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db | 1214 | case WLAN_CIPHER_SUITE_CCMP_256: |
27b3eb9c JB |
1215 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS)) |
1216 | return; | |
1217 | if (tid < 0) | |
1218 | pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS]; | |
1219 | else | |
1220 | pn = key->u.ccmp.rx_pn[tid]; | |
1221 | memcpy(pn, seq->ccmp.pn, IEEE80211_CCMP_PN_LEN); | |
1222 | break; | |
1223 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
56c52da2 | 1224 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
27b3eb9c JB |
1225 | if (WARN_ON(tid != 0)) |
1226 | return; | |
1227 | pn = key->u.aes_cmac.rx_pn; | |
1228 | memcpy(pn, seq->aes_cmac.pn, IEEE80211_CMAC_PN_LEN); | |
1229 | break; | |
8ade538b JM |
1230 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1231 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1232 | if (WARN_ON(tid != 0)) | |
1233 | return; | |
1234 | pn = key->u.aes_gmac.rx_pn; | |
1235 | memcpy(pn, seq->aes_gmac.pn, IEEE80211_GMAC_PN_LEN); | |
1236 | break; | |
00b9cfa3 JM |
1237 | case WLAN_CIPHER_SUITE_GCMP: |
1238 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1239 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS)) | |
1240 | return; | |
1241 | if (tid < 0) | |
1242 | pn = key->u.gcmp.rx_pn[IEEE80211_NUM_TIDS]; | |
1243 | else | |
1244 | pn = key->u.gcmp.rx_pn[tid]; | |
1245 | memcpy(pn, seq->gcmp.pn, IEEE80211_GCMP_PN_LEN); | |
1246 | break; | |
27b3eb9c JB |
1247 | default: |
1248 | WARN_ON(1); | |
1249 | break; | |
1250 | } | |
1251 | } | |
1252 | EXPORT_SYMBOL_GPL(ieee80211_set_key_rx_seq); | |
1253 | ||
1254 | void ieee80211_remove_key(struct ieee80211_key_conf *keyconf) | |
1255 | { | |
1256 | struct ieee80211_key *key; | |
1257 | ||
1258 | key = container_of(keyconf, struct ieee80211_key, conf); | |
1259 | ||
1260 | assert_key_lock(key->local); | |
1261 | ||
1262 | /* | |
1263 | * if key was uploaded, we assume the driver will/has remove(d) | |
1264 | * it, so adjust bookkeeping accordingly | |
1265 | */ | |
1266 | if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) { | |
1267 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
1268 | ||
092c4098 AW |
1269 | if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC | |
1270 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE | | |
1271 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM))) | |
27b3eb9c JB |
1272 | increment_tailroom_need_count(key->sdata); |
1273 | } | |
1274 | ||
1275 | ieee80211_key_free(key, false); | |
1276 | } | |
1277 | EXPORT_SYMBOL_GPL(ieee80211_remove_key); | |
1278 | ||
1279 | struct ieee80211_key_conf * | |
1280 | ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, | |
1281 | struct ieee80211_key_conf *keyconf) | |
1282 | { | |
1283 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1284 | struct ieee80211_local *local = sdata->local; | |
1285 | struct ieee80211_key *key; | |
1286 | int err; | |
1287 | ||
1288 | if (WARN_ON(!local->wowlan)) | |
1289 | return ERR_PTR(-EINVAL); | |
1290 | ||
1291 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1292 | return ERR_PTR(-EINVAL); | |
1293 | ||
1294 | key = ieee80211_key_alloc(keyconf->cipher, keyconf->keyidx, | |
1295 | keyconf->keylen, keyconf->key, | |
2475b1cc | 1296 | 0, NULL, NULL); |
27b3eb9c | 1297 | if (IS_ERR(key)) |
c5dc164d | 1298 | return ERR_CAST(key); |
27b3eb9c JB |
1299 | |
1300 | if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED) | |
1301 | key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT; | |
1302 | ||
1303 | err = ieee80211_key_link(key, sdata, NULL); | |
1304 | if (err) | |
1305 | return ERR_PTR(err); | |
1306 | ||
1307 | return &key->conf; | |
1308 | } | |
1309 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_add); | |
4271d4bd JB |
1310 | |
1311 | void ieee80211_key_mic_failure(struct ieee80211_key_conf *keyconf) | |
1312 | { | |
1313 | struct ieee80211_key *key; | |
1314 | ||
1315 | key = container_of(keyconf, struct ieee80211_key, conf); | |
1316 | ||
1317 | switch (key->conf.cipher) { | |
1318 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1319 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
1320 | key->u.aes_cmac.icverrors++; | |
1321 | break; | |
1322 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
1323 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1324 | key->u.aes_gmac.icverrors++; | |
1325 | break; | |
1326 | default: | |
1327 | /* ignore the others for now, we don't keep counters now */ | |
1328 | break; | |
1329 | } | |
1330 | } | |
1331 | EXPORT_SYMBOL_GPL(ieee80211_key_mic_failure); | |
1332 | ||
1333 | void ieee80211_key_replay(struct ieee80211_key_conf *keyconf) | |
1334 | { | |
1335 | struct ieee80211_key *key; | |
1336 | ||
1337 | key = container_of(keyconf, struct ieee80211_key, conf); | |
1338 | ||
1339 | switch (key->conf.cipher) { | |
1340 | case WLAN_CIPHER_SUITE_CCMP: | |
1341 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1342 | key->u.ccmp.replays++; | |
1343 | break; | |
1344 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1345 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
1346 | key->u.aes_cmac.replays++; | |
1347 | break; | |
1348 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
1349 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1350 | key->u.aes_gmac.replays++; | |
1351 | break; | |
1352 | case WLAN_CIPHER_SUITE_GCMP: | |
1353 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1354 | key->u.gcmp.replays++; | |
1355 | break; | |
1356 | } | |
1357 | } | |
1358 | EXPORT_SYMBOL_GPL(ieee80211_key_replay); |